(c) Alauddin Khilji built the Siri Fort. Ghiyasuddin Tughlaq established Tughlaqa-bad. Feroz Shah Tughlaq established Hiaar. Sikander Lodi established the Agra city. Siri Fort, in the city of New Delhi, was built during the rule of Ala-ud-Din Khalji of the Delhi Sultanate to defend the city from the onslaught of the Mongols. Tughlaqabad Fort is a ruined fort in Delhi, stretching across 6.5 km, built by Ghiyas-uddin Tughlaq, the founder of Tughlaq dynasty, of the Delhi Sultanate of India in 1321, as he established the fifth historic city of Delhi, which was later abandoned in 1327.